A car of maas M is moving on a horizontal circular path of radius r. At an instant its speed is v and is increasing at a rate a.

Options

A. `(i),(ii)`
B. `(ii),(iii)`
C. `(i),(iv)`
D. `(iii),(iv)`

Answer

B

Explanation

a: total acceleration
`f=sqrt(((mv^(2))/(r ))^(2)+(ma_(t))^(2))`
`fgt(mv^(2))/(r )`
`f_(max)=mumg,fgtma`